A missing 6-year-old girl was found near the body of her 4-year-old sister in Mississippi on Thursday, authorities said, after the girls mother was found dead in their Louisiana home.

The body of the girls mother, 35-year-old Callie Brunett, was discovered in Loranger, a town in Louisianas Tangipahoa Parish. The same day she was found, Daniel Callihan, 36, was arrested across the state line in Jackson, Mississippi on suspicion of killing Brunett and abducting Jalie Brunett, 6, and Erin Brunett, 4, parish sheriff Daniel Edwards said.

Investigators believe Callihan killed Brunett and took the girls on Wednesday, Edwards said in a news conference Friday evening . Brunetts parents reported her missing late Wednesday night, he said.